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充放电制度对La-Mg-Ni合金电极性能的影响

Effects of charge-discharge system on the performance of the La-Mg-Ni alloy electrodes

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【Author】 DONG Xiao-ping1,2,LU Fan-xiu1,ZHANG Yang-huan2,3,WANG Xin-lin2(1.School of Material Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China;2.Department of Functional Material Research,Central Iron and Steel Research Institute,Beijing 100081,China;3.School of Material,Inner Mongolia University of Science and Technology,Baotou,Nei Mongol 014010,China)

【机构】北京科技大学材料科学与工程学院；钢铁研究总院功能材料研究所；钢铁研究总院功能材料研究所北京100083；北京100081；北京100083；内蒙古科技大学材料学院；内蒙古包头014010；

【摘要】采用不同电流进行充放电测试,研究充放电制度对La0.75Mg0.25Ni3.5Cox(x=0、0.2、0.4和0.6)合金电极电化学性能的影响。随着电流的增加,合金的最大放电容量降低。在600 mA/g时合金的循环寿命长于100 mA/g时。X射线光电子能谱(XPS)的结果表明,在KOH电解液中,电极失效的主要原因是合金中La和Mg元素的腐蚀和氧化。更多还原

【Abstract】 The effects of charge-discharge system on the electrochemical performance of La0.75Mg0.25Ni3.5Cox(x=0,0.2,0.4 and 0.6) alloy electrodes were studied by the charge-discharge tests with different currents.The maximum discharge capacities of the alloys decreased with the increasing of the current.The cycle lives of the alloys at 600 mA/g were longer than those at 100 mA/g.The result of X-ray photoelectron spectroscopy(XPS) showed that the main reason of the electrode degradation in KOH electrolyte was the corrosion and oxidation of La and Mg elements in the alloy.更多还原

【关键词】 La-Mg-Ni系；电极性能；电流；
【Key words】 La-Mg-Ni system； the performance of electrode； current；

【基金】国家自然科学资金资助项目(50642033,50701011);内蒙古自然科学基金资助项目(200711020703);内蒙古科技计划资助项目(20050205)

【文献出处】电池 ,Battery Bimonthly , 编辑部邮箱 ,2008年01期

【分类号】TM912.2
【被引频次】5
【下载频次】111

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